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Juli2301 [7.4K]
4 years ago
6

In the reaction C + O2 CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen

Chemistry
1 answer:
ICE Princess25 [194]4 years ago
6 0
<h3>Answer:</h3>

54 g

<h3>Explanation:</h3>
  • The reaction between carbon and oxygen gas is given by the equation;

C(s) + O₂(g) → CO₂(g)

We are given;

18 g of Carbon

72 g of Carbon dioxide

  • We need to calculate the amount of oxygen needed for the reaction.
  • From the law of conservation of mass in chemical equation, the mass of the reactants is equal to the mass of the product.

Therefore;

Mass of Oxygen gas + mass of the carbon = Mass of carbon dioxide

Therefore;

Mass of Oxygen gas = mass of carbon dioxide - mass of carbon

                                  = 72 g - 18 g

                                  = 54 g

Therefore, the mass of Oxygen needed would be 54 g

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The compound magnesium phosphate has the chemical formula Mg3(PO4)2. In this compound, phosphorous and oxygen act together as on
Lapatulllka [165]

Answer:

The 2 in the formula means that, there are 2 phosphate anions that forms the salt.

Explanation:

Magnesium phosphate is a ionic salt.

The formula indicates that 3 moles of Mg and 2 moles of anion phosphate are contained in 1 mol of compound.

3Mg²⁺ + 2PO₄⁻³  →  Mg₃(PO₄)₂

The phosphate anion comes from phosphoric acid and it is generated when the acid loses the 3 protons.

H₃PO₄  →  3H⁺  + PO₄⁻³

Phosphate has a negative charge of -3, so when it bond to magnesium, which has a charge of +2, there must be 3 magnesium and 2 phosphate to make a global charge +6 -6 in the ions

6 0
3 years ago
An example of a chemical change is burning a wood log to give a pile of ashes.<br> O True O False
serious [3.7K]

Answer:

True

Explanation:

<em>An example of a chemical change is burning a wood log to give a pile of ashes.</em> TRUE. In a chemical change there is a change in the identity of the substances, that is, some substances react (reactants) in order to form other substances (products).

A wood log is made of cellulose and organic compound that react with oxygen to produce carbon dioxide and water mainly.

5 0
3 years ago
Read 2 more answers
Complete the following nuclear equations by entering the missing isotope:
Margarita [4]

The nuclear equation :

₈₂²¹⁴Pb ⇒ ₈₃²¹⁴Bi + ₋₁⁰e

<h3>Further explanation </h3>

Given

₈₂²¹⁴Pb

beta β ₋₁e⁰ particles

Required

Nuclear equation

Solution

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

  • alpha α particles ₂He⁴
  • beta β ₋₁e⁰ particles
  • gamma particles ₀γ⁰
  • positron particles ₁e⁰
  • neutron ₀n¹

The principle used is the sum of the atomic number and mass number before and after the decay reaction is the same

The reaction

₈₂²¹⁴Pb ⇒ X + ₋₁⁰e

The element X has

-the atomic number = 82 + 1 = 83

-the mass number = 214

In the periodic system, the element with atomic number 83=Bismuth

3 0
3 years ago
They are substances that produce ions when they dissolve in water.
stira [4]

Electrolytes are substances that produce ions when they dissolve in water.

What are electrolytes?

When some substances are dissolved in water, they undergo physical or chemical changes, creating ions in solution. These substances form an important class of compounds called electrolytes. Substances that do not release ions when dissolved are called non-electrolytes. A substance is said to be a strong electrolyte if the physical or chemical process that produces ions is inherently 100% efficient (all dissolved compounds produce ions). A solute is said to be a weak electrolyte if only a relatively small portion of the solute undergoes ion production processes.

By measuring the electrical conductivity of aqueous solutions containing substances, substances can be identified as strong, weak, or non-electrolyte. To conduct electricity, a substance must contain free-moving charged species. The best known is the conduction of electricity through metal wires. In this case, the mobile charged unit is the electron.

Therefore, Electrolytes are substances that produce ions when they dissolve in water.

To know more about electrolyte, visit:

brainly.com/question/17089766

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7 0
2 years ago
3) a) (2 points) Label the 1H NMR spectrum of adipic acid by identifying key resonances. Use letters (a, b, c, etc.) to match Hs
Bess [88]

Answer:

The label of spectrum is attached.

Explanation:

adipic acid is equal to:

COOH - CH2 - CH2 - CH2 - CH2 - COOH

(1)            (2)      (3)       (3)       (2)       (1)

The structure of adipic acid indicates that it has 3 equivalent carbons, therefore it should have 3 peaks in the spectrum:

The first peak at approximately 172 ppm is from carbon (1) COOH. The second peak is at approximately 23 ppm and is by carbon number (3) CH2. and the third peak is at approximately 37 ppm and is due to group number (2) CH2.

3 0
3 years ago
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